Dr. J. B. Overton, Professor 

 of Plant Physiology, University 

 of Wisconsin, Madison. Ascent 

 of sap; Root pressure. 



Sir J. C. Bose, Director 

 of the Bose Botanical In- 

 stitute, Calcutta, India. 

 Mr. Bose is most favorably 

 known for the delicate instru- 

 ments which he has devised 

 and applied to the study of 

 plant physiology, especially 

 to the phenomena of irrita- 

 bility and conduction of stim- 

 uli. 



